| Author |
Message |
quan228228
Joined: 23 Mar 2006
Posts: 214
Helped: 13
|
 05 Sep 2007 7:03 what is "delay_mode_unit" for ncverilog? |
|
|
|
what is "delay_mode_unit" for ncverilog tool?
Could you give me an example?
thanks!
David
|
|
| Back to top |
|
 |
avimit
Joined: 16 Nov 2005
Posts: 415
Helped: 68
Location: Fleet, UK
|
| 05 Sep 2007 9:01 Re: what is "delay_mode_unit" for ncverilog? |
|
|
|
When applied, all the delays anywhere in your design, such as cell delays in netlist are set to unity. It is used while running nelist sims, to just make them faster.
Kr,
Avi
http://www.vlsiip.com
|
|
| Back to top |
|
|
quan228228
Joined: 23 Mar 2006
Posts: 214
Helped: 13
|
| 05 Sep 2007 10:06 Re: what is "delay_mode_unit" for ncverilog? |
|
|
|
| avimit wrote: |
When applied, all the delays anywhere in your design, such as cell delays in netlist are set to unity.
Avi
http://www.vlsiip.com |
Where, what does "unity" mean?
David
|
|
| Back to top |
|
|
avimit
Joined: 16 Nov 2005
Posts: 415
Helped: 68
Location: Fleet, UK
|
| 05 Sep 2007 10:19 Re: what is "delay_mode_unit" for ncverilog? |
|
|
|
| unity means 1. So all your delays throught the design are set to 1 ps or ns or whatever your timescale is
|
|
| Back to top |
|
|
quan228228
Joined: 23 Mar 2006
Posts: 214
Helped: 13
|
| 05 Sep 2007 10:34 Re: what is "delay_mode_unit" for ncverilog? |
|
|
|
| avimit wrote: |
| unity means 1. So all your delays throught the design are set to 1 ps or ns or whatever your timescale is |
for example;
timescale 1ns/1ps
assign #3 a = b&c;
after adding option "delay_mode_unit", the NC-VERILOG tool assume that the delay value is 1 ns, not 3 ns. right?
David
|
|
| Back to top |
|
|
beta0
Joined: 24 Nov 2003
Posts: 117
Helped: 7
|
| 06 Sep 2007 15:54 Re: what is "delay_mode_unit" for ncverilog? |
|
|
|
| quan228228 wrote: |
| avimit wrote: |
| unity means 1. So all your delays throught the design are set to 1 ps or ns or whatever your timescale is |
for example;
timescale 1ns/1ps
assign #3 a = b&c;
after adding option "delay_mode_unit", the NC-VERILOG tool assume that the delay value is 1 ns, not 3 ns. right?
David |
no, delay mode is used for cell delay
|
|
| Back to top |
|
|
